fix failure to preserve r6 in s390x asm; per ABI it is call-saved
[musl] / src / aio /
drwxr-xr-x   ..
-rw-r--r-- 10638 aio.c
-rw-r--r-- 1561 aio_suspend.c
-rw-r--r-- 2680 lio_listio.c